John Kirksey wrote:

My question is, in these or similar conditions, would you consider using at
least partial carb heat to help prevent icing, or periodically turn the carb
heat on to clear out any ice that may have formed?

I would never use partial carb heat under any circumstances. I've been taught to
either use full heat or none.

Is there ever a time when
you would use carb heat as a preventive measure?

Sure. A good example would be putting carb heat on during landing approaches
(standard procedure for many aircraft).

George Patterson
If a man gets into a fight 3,000 miles away from home, he *had* to have
been looking for it.